商品猪群体效应对纯种猪胴体性状基因组选择准确性的影响

doi:10.11843/j.issn.0366-6964.2023.12.006

摘要/Abstract

摘要： 旨在探究提高杜洛克猪胴体性状基因组选择准确性的方法,为提高种猪胴体性状的基因组选择准确性提供理论基础。本研究以2 796头杜洛克公猪和3 149头杜长大商品猪的校正115 kg体重日龄(AGE115)、校正115 kg背膘厚(BF115)和校正115 kg眼肌面积(LEA115)为研究对象。构建加性动物模型和加显动物模型验证显性效应对杜洛克猪基因组选择准确性的影响;探究在参考群中对杜洛克猪与杜长大猪进行不同的组合对于杜洛克猪基因组选择准确性的影响。参考群分组如下:组1,杜洛克猪作为参考群;组2,杜长大猪作为参考群;组3,杜洛克和杜长大猪合并作为参考群。研究结果表明:加入显性效应后,AGE115基因组选择的准确性在组1、组2、组3中提高了2.84%~4.87%,杜洛克猪BF115和LEA115的基因组选择准确性在组1、组3中提高了1.37%~16.18%;组3相对于组1,在加性动物模型中BF115和LEA115的基因组选择准确性提高了6.19%~7.35%,在加显动物模型中BF115的基因组选择准确性提高了6.52%。综上,显性效应能够提升猪胴体性状的基因组选择准确性,合并杜洛克猪与杜长大猪作参考群能够提升猪部分胴体性状的基因组选择准确性,建议将合适的杂种猪群体纳入纯种猪选育的参考群。

关键词: 杜洛克猪, 杜长大猪, 基因组选择, 显性效应, 参考群

Abstract: The purpose of this experiment was to explore methods to improve the accuracy of genomic selection (GS) for Duroc pigs’ carcass traits, and to provide a theoretical basis for improving the accuracy of GS for breeding pig carcass traits. In this study, corrected backfat thickness at 115 kg (BF115), corrected lion eye area at 115 kg (LEA115), corrected age at 115 kg (AGE115) were studied in 2 796 Duroc boars and 3 149 Duroc×Landrace×Yorkshire (DLY) commercial pigs. Additive animal model (AM) and additive add dominant animal model (ADM) were constructed to verify the impact of dominant effects on GS accuracy of Duroc pigs; exploring the impact of different combinations of DLY and Duroc pigs in the reference population on GS accuracy of Duroc pigs. The reference population were divided into the following groups: group 1, Duroc pigs as the reference group; group 2, with DLY pigs as the reference group; group 3, Duroc and DLY pigs were merged as reference group. The research results indicated that after adding dominant effects, the accuracy of GS for AGE115 increased by 2.84% to 4.87% in group 1, 2, and 3, while the accuracy of GS for Duroc BF115 and LEA115 increased by 1.37% to 16.18% in group 1 and 3; compared to group 1, the accuracy of GS for BF115 and LEA115 in the AM increased by 6.19% to 7.35% in group 3, and by 6.52% in the ADM. In summary, dominant effects can improve the accuracy of GS for pig carcass traits, and combining Duroc and DLY pigs as reference population can improve the accuracy of GS for some pig carcass traits, that it is recommended to include suitable hybrid pig population in the reference population for purebred pig breeding.

Key words: Duroc pig, Duroc×Landrace×Yorkshire pigs, genomic selection, dominant effects, reference population

中图分类号:

S828.2

杨凯, 卢倬达, 何健, 张瑞琪, 王素青, 李克标, 赵云翔, 朱晓萍, 郭金彪. 商品猪群体效应对纯种猪胴体性状基因组选择准确性的影响[J]. 畜牧兽医学报, 2023, 54(12): 4943-4951.

YANG Kai, LU Zhuoda, HE Jian, ZHANG Ruiqi, WANG Suqing, LI Kebiao, ZHAO Yunxiang, ZHU Xiaoping, GUO Jinbiao. The Population Effect of Commercial Pigs on the Accuracy of Genomic Selection for Carcass Traits in Duroc Pigs[J]. Acta Veterinaria et Zootechnica Sinica, 2023, 54(12): 4943-4951.

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